> wrote in message
ups.com...
>
> Cords wrote:
>> I had unfortunate incident at a BMW dealership. Whilst sevicing My 1997
>> 740 4.4 litre the technician accidently dropped the screw top of the
>> spark plug into one bore. Needless to say on start up destroyed the
>> head and scored the cylinder. The dealership now wants to machine the
>> bore and put in a metal liner.
>> Is this possible on a aluminium alusil engine?
>> I would have thought the correct thing to do would be to replace the
>> block or the entire engine!
>>
>> Any advice would be appreciated
>> Cords
>
> I would have thought that the replacement option would be easier and
> just as cost effective. I would guess that the piston and maybe the
> con-rod is damaged too.
>

Not sure about the Alusil 4.4, but the Nikasil 4.0 can not be rebored /
sleeved because there is insufficient clearance to the oil / waterways in
the block.